Apparatus for sharpening the teeth of sickle-bars.



J. PRIEL.

APPARATUS FOR SHARPENING THE TEETH 0F SICKLE BARS.

APPLICATION HLED mamas. l9l6.

L sj fi fih Patented June 26, 1917.

2 SHEET5SHEET I.

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APPARATUS FOR SHARPENING THE TEETH OF SICKLE BARS.

APPLICATION FILED DEC. 28, I916.

1,231,425,, Patented June 26,1917.

2 SHEETS-SHEET 2.

Witne W1 by JAMES PRIEL, OF OVERTON, NEBRASKA.

APPARATUS FOR SHARPENING THE TEETH OF SICKLE-BARS.

Application filed December To all whom it may concern.

Be it known that I, JAMES PRIEL, a citizen of the United States, residing at Overton in the county of Dawson and State of Nebraska, have invented a new and useful Apparatus for Sharpening the Teeth of Sickle-Bars, of which the following is a specification.

This invention relates to apparatus for sharpening the teeth of sickle bars, one of its objects being to provide a novel form of holder whereby thesickle bar will be supported at a desired angle relative to the sharpening element, it beingpossible readily to tilt the bar so as to bring one of the teeth into engagement with the sharpening element said bar being shiftable longitudinally to bring the teeth successively to sharpening position.

A further object is to provide sharpening apparatus which provides a seat for the operator and which apparatus is so positioned that it can be easily manipulated so that all of the teeth will be sharpened 011 both edges quickly and efiiciently.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention. a

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings Figure l is an elevation of the apparatus and showing a sickle bar in position thereon.

Fig. 2 is a plan view of the structure shown in Fig. 1.

Fig. 3 is an enlarged section through the top frame of the seat supporting structure and showing the saddle and adjacent parts.

Referring to the figures by characters of reference 1 designates opposed A-frames the front legs of which are provided with upwardly and backwardly curved extensions 2 in the upper ends of which isjournaled a transverse shaft 3 carrying a sharpening wheel t of emery or the like. Secured to this shaft is a sprocket 5 adapted to receive motion through a chain. 6 from a drive Specification of Letters Patent.

Patented June 26, 1917. 28,1916. Serial in 139,328.

sprocket 7 which is secured to a transverse shaft 8 journaled within the upper portions of the opposed l-t-frames 1 and provided at each end with a crank arm 9. The two crank arms are extended in opposite directions and are connected by pitmen 1O to treadles 11 which straddle the rear legs of the A-frames and are pivotally mounted on a cross rod 12 carried by said legs. A rearwardly extending top frame 13 preferably formed of a strip of metal bent to U-shape, is secured to the upper ends of the A-frames and is preferably arranged horizontally, this top frame being connected to the rear legs of the A-frames 1 and braces 14:. The sides of the top frame are preferably paral lel, as shown particularly in Fig. 2 and the rear portion of the top frame is adapted to support a seat 15 to be occupied by the operator. Thus it will be seen that a person mounted on the seat 15 can place both feet on the treadles 11 and thus cause motion to be transmitted through the pitmen 10 to the crank arms 9, thereby rotating shaft 8 and driving the grinding or sharpening wheel i.

The structure heretofore described is adapted to be used in connection with a holding structure of novel form. This holding structure includes a saddle 16 which rests upon the top frame 13 and is held thereto by a bolt 1? which extends clownwardly through a plate 18 engaging the lower edges of the frame 13. Arranged at the upper end of the bolt 17 is a ball 19 which is arranged within. a socket member 20 attached to the bottom of a longitudinally channeled holding member 21 at the center thereof. The ends of this channeled holding member 21 are downturned as indicated at 22 with their channeled faces outermost. Within the channels in the downturned end oortions are seated strips 23 held in place by bolts 24 and each strip has a plurality of apertures 25 any one of which is adapted to receive the bolt 24: so that the strip is thus adjustable longitudinally. Each strip has downwardly diverging arms 26 at its lower end. Pivotally connected to each of the downturned portions 22 by the bolt 24 is the upper section 27 of a jointed support, there being oppositely extending springs 28 connecting each of these sections to the adjacent arms 26 whereby said arms are normally vheld equidistant from the member 27. The

placed in the bracket 41 and a 34. a is. adjusted longitudinally elose to the active lower end of each of the members 27 of the support has a stop 29 from which extends a forked guide 30. The lower section 31 of each support is pivotally attached to the upper section 27 above the lower end of said upper section and has an elongated foot 32 at its free end. When the lower section 31 is in active position it extends through the forked guide and against the stop 29, as shown at the left of Fig. 1.

Hooks 33 are extended downwardly from the holding bar 21 at opposite sides of the center thereof and are adapted to be engaged by the respective sections 31 of the support. In Fig. 1, one of the sections 31 has been shown in engagement with its hook 33, while the other has been shown extended downwardly to active position, thus to support the holding bar 21 in an inclined position and in a vertical plane intersecting the top frame 13 at anacute angle. See Fig. 2.

Mounted within the channeled holding member 21 is an elongated slide 34 having upstanding fingers 35 at the ends thereof.

-, Mounted on each of these fingers is a coiled spring 36. and arranged within each coiled spring and slidably mounted on each finger 35 is a sleeve 37 the upper end of which is attached to the upper end portion of the spring 36 so as to be thus yieldingly supported by the spring. The lower end of each springis attached to its finger in any desired manner.

a Each sleeve is provided at its upper end with a bracket 38 and extending into the two opposed brackets are bearing studs 39 provided at the ends of a gripping bar 40 having U-shaped brackets 41 carrying binding screws 42. This gripping strip 40 is parallel with the slide 34 and the holding strip 31 but, as will be obvious, is yieldingly supported by the springs 36 and is also adapted to be swung about its longitudinal axis.

In using the apparatus the supporting structure is placed across the top frame 13 at a desired angle thereto and is attached to said frame by means of the saddle 16 and cooperating parts. One of the lower sections 31 is then placed in engagement with its hook 33 so that the holding frame 21 will be held inan inclined position. This will bring the clamping strip/10 close to but at an angle to the periphery of the sharpening wheel 4. The sickle bar indicated generally at 43 is clamped against the clamping strip 40 by means of screws 42. As soon as the parts have thus been securely fastened together, the operator .occupyingthe seat 15 actuates the treadles 11 so as to cause the grinding or sharpenlng wheel 4 to revolve at a high speed. The slide to bring the first tooth of the sickle bar into position face of the grinding wheel. The strip 40 and the bar 43 are then thrust downwardly and the strip 40 and bar 43 swung about the longitudinal axis of the strip 40 so as to bring one edge of-the first tooth against the periphery of the sharpening wheel 4. The entire structure is then shifted longitudinallyto bring the corresponding edge of the next tooth into engagement with the wheel 4. This operation is continued until one edge of each of the teeth has been sharpened. The elevated supporting section 34. is then lowered while the section 31 which has been extended downwardlyis raised into engagement with its hook 33. Thus the holding strip 21 is inclined downwardly inthe opposite direction and by swinging the said holding strip 21 about its universal connection with the saddle 16, each of the teeth on the sickle bar can have its other edge presented to the periphery .of the grinding wheel and quickly sharpened in the manner hereinbefore point ed out.

When the apparatus is not is use,- the saddle 16 can be disconnected to thetop frame 13 and the entire sickle holdingfstructure can thus be quickly disconnected from the frame 13. lVith the parts thus disconnected, the sharpening wheel 4 can be used for grinding other articles than the teeth on a sickle bar'.

By mounting the strip 49 in the manner described it is not only capable of turning about its longitudinal axis butit can also be depressed against the action of the supporting springs 36 and can also be swung about the bolt 24 as a center and against the action of certain of the springs 28. Thus any necessary movement in order to properly present one edge of a tooth to the periphery of the sharpening wheel 4, can beeffected.

lVhat'is claimed is V 1. The combinat'on with a supporting structure, a grinding wheel journaled there on, and meansfor actuating the wheel, of a holding element extending transversely of said structure and tiltable relative thereto, universal connections between said element and the structure, adjustable ground engaging supports connected to the ends of said element, sickle bar gripping means,,and a yieldable connection between said gripping means and the holding element.

2. The combination with a supporting structure, a grinding wheel journaled thereon,and means for actuating the wheel, of a holding element extending transversely of said structure andtiltable relative thereto, universal, connections between said element and the structure, adjustable ground engaging supports connected to the ends of said element, sickle bar gripping means, and a slidable connection between said gripping means and theholding element.

3. The combination with a supporting structure, a grinding wheel j ournaled thereon, and means :for actuating the wheel, of a holding element extending transversely of said structure, universal connections between said element and the structure, adjustable supports connected to the ends of said element, sickle bar gripping means, and a yieldable and slidable connection between said gripping means and the holding element.

4-. The combination with a supporting structure, a revoluble grinding clement carried thereby, and means for actuating said element, of aholding element, adjustable supports connected to the ends thereof, a universal connection between said holding element and the supporting structure, said element being tiltable relative to its end supports, yielding means for retarding the tilting action of the holding element, and means movable with the holding element for grip ping a member to be sharpened.

5. The combination with a supporting structure, a revoluble grinding element carricd thereby, and means for actuating said element, 01' a holding element, adjustable supports connected to the ends thereof, a universal connection between said holding element and the supporting structure, said element being tiltable relative to its end supports, yielding means for retarding the tilting action of the holding element, and means movable with the holding element for holding a member to be sharpened, said means including a slide carried by the holding element, a yieldingly supported bar carried by the slide and means upon the bar for engaging a member to be sharpened.

6. The combination With a supporting structure, a revoluble grinding element carried thereby, and means for actuating said element, of a holding element, adjustable supports connected to the ends thereof, a universal connection between said holding element and the supporting structure, said element being tiltable relative to its end supports, yielding means for retarding the tilt ing action of the holding element, and means movable with the holding element for hold- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner ing a member to be sharpened, said means including a slide carried by the holding element, a yieldingly supported bar carried by the slide, means upon the bar for engaging a member to be sharpened, and a pivotal connection between the bar and the yieldingly supported means.

7. The combination with a supporting structure, a sharpening element mounted for rotation thereon, means for actuating said element, of a holding element extending across the supporting structure, a universal connection between said structure and holding element, adjustable supports pivotally connected to the ends of the holding element, yielding means for retarding the pivotal movement of said holding element relative to its supports, a slide carried by the holding element, yieldingly supported members upon the slide, and means carried by said members for engaging and holding an article to be sharpened.

8. The combination with a supporting structure, a sharpening element mounted for rotation thereon, means for actuating said element, of a holding element extending across the supporting structure, a universal connection between said structure and holding element, adjustable supports pivotally connected to the ends of the holding element, yielding means for retarding the pivotal movement of said holding element relative to its supports, a slide carried by the holding element, yieldingly supported members upon the slide, and means carried by said members for engaging and holding an article to be sharpened, said means including a bar mounted for rotation about its longitudinal axis, and clamping means connected to the bar.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of tWo witnesses.

JAMES PRIEL.

Witnesses:

D. '1. Bones, WESLEY COPPER.

of Patents,

Washington, D. C. 

